A few I liked...
Tidal Speakers / Lamm hybrid monoblocks were maybe the most neutral system I heard... they were also incredibly resolving yet very easy to listen to. It was a close tie with the Merlins driven by Joule Electra OTL monoblocks though. This was another very impressive system in terms of neutrality and the ability to disappear and let the music come through.
Oswalds Mill Audio had some solid cherry speakers using a 15" woofer, a ribbon tweeter w/ waveguide, and a midrange compression driver in a solid cherry horn. Driven with a 2A3 SET amp. This was the most startlingly real sax I have ever heard reproduced, and the dynamcs were incredible. They had no digital front end though.
MBL... huge sound, pretty cool
ViV Labs evanui speaker... a 3" single driver BLH covering 50-30k Hz @-6 dB. It has no surround, but just floats in this gasketed chamber. The cone weighs almost nothing, I'd guess a gram or so. Sounded great.
Feastrex.... a very wide range single driver. The 5" field coil drivers sounded great, as did the Maxxhorns, which have unbelievable bass response. Very cool speakers.
Selah Audio... new line arrays with 32 little woofers and 8 ribbons. If you like line arrays, this one is very fast and detailed and has exceptional dynamics.
SP Tech.... they deserve their growing reputation. I just heard the minis and they sounds a lot bigger than they are, and they're a good value as well.
I only saw a small fraction of what was there, but there are a lot of nice systems.